The KDJB-802 relay protection tester adopts a structure that can run independently on a single machine or be connected to a laptop. The host is equipped with a high-speed digital signal processor microcomputer, a true 16 bit DAC module, a modular high fidelity high-power amplifier, a large screen LCD display, and a flexible and convenient touch screen controller. Has strong operational capabilities. Small size, high precision. It has the performance and functions of a large testing instrument, as well as the advantages of a small and flexible testing instrument, easy operation, and high reliability, with a high cost performance ratio.
 

1. A 16 bit DAC chip with 16 bit high resolution ensures high waveform fitting accuracy and good linearity. Small signal output also ensures minimal distortion.
2. The new high fidelity power amplifier adopts a new high-power modular high fidelity power amplifier component in the output stage, which can be used for both current output and voltage output. The output power is high, and each phase voltage can output up to AC100V/130V (xN), and the current triple output can reach up to AC90A (xN-30A)/120A (xN-40A)/180A (xN-60A). Good accuracy and high reliability.
3. The current and voltage are directly output as phase voltage and phase current using a DC power amplifier output method, which can directly output AC voltage, AC current, DC voltage, and DC current, with variable angles and frequencies, and can superimpose 0-9 harmonics.
4. Self protection, adopting a reasonably designed heat dissipation structure, and having reliable and complete multiple protection measures and power soft start, as well as certain fault self diagnosis and locking functions.
5. Rich contacts, with 10 input contacts and 6 output contacts. The input contacts are compatible with both empty contacts and 0-250V potential contacts, and can be intelligently and automatically recognized.
6. The integrated single machine box structure of the host can be powered on with an AC 220V power supply and start working immediately. Small size, light weight, easy to carry, and convenient for flow testing.
7. High cost-effectiveness, belonging to cross disciplinary joint design products, integrating multiple professional technological achievements. Combining the performance of a large testing instrument with the price of a small testing instrument, it has a high cost performance ratio.

Accuracy within the rated range
electric current
AC phase current:<0.2% ± 0.1% FS (FS is the full-scale value)
AC high current terminal output:<0.2% ± 0.1% FS
DC current:<0.5% ± 0.1% FS
 
Voltage
AC voltage:<0.2% ± 0.1% FS (FS is the full-scale value)
DC voltage:<0.5% ± 0.1% FS
other
Frequency accuracy (at 50Hz):<0.001Hz ± 0.1% FS (FS is the full-scale value)
Phase accuracy:<0.5 °
Harmonic distortion:<0.5%
Time measurement accuracy:<0.1ms